Repeating it with energy, deliver rhetoric (7)

I believe the answer is:

iterant

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'repeating' is the definition.
(I've seen this before)

'it with energy deliver rhetoric' is the wordplay.
'with' is a charade indicator (letters next to each other).
'energy' becomes 'e' (physics symbol as in E=mca).
'deliver rhetoric' becomes 'rant' (I can't explain this - if you can you should give a lot more credence to this answer).
'it'+'e'+'rant'='ITERANT'

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(Other definitions for iterant that I've seen before include "Repeating" , "Echoing" .)

I've seen this clue in The Times.

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